Journal of Mathematical Modeling
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ارسال های اخیر

An algorithm for multiobjective fuzzy linear programming problem with interval type2 fuzzy numbers and ambiguity in parameters
(University of Guilan, 20240301)Considering multiple criteria and objectives simultaneously in a single realworld problem and the fuzzy nature of this type of problem is of particular importance and application. As a result, multiobjective interval ...

A uniformly convergent computational method for singularly perturbed parabolic partial differential equation with integral boundary condition
(University of Guilan, 20240301)This paper presents a numerical method for a class of singularly perturbed parabolic partial differential equations with integral boundary conditions (IBC). The solution to the considered problem exhibits pronounced boundary ...

MoorePenrose inverse of an interval matrix and its application
(University of Guilan, 20240301)In this paper, we introduce the concept of MoorePenrose inverse of a rectangular interval matrix based on a modified interval arithmetic. We determine the MoorePenrose inverse in such a way that it satisfies all the four ...

A new $(I+P)$like preconditioner for the SOR method for solving multilinear systems with $ \mathcal{M} $tensors
(University of Guilan, 20240301)The use of preconditioning techniques has been shown to offer significant advantages in solving multilinear systems involving nonsingular $\mathcal{M}$tensors. In this paper, we introduce a new preconditioner that employs ...

Inverse eigenvalue problem of nonnegative matrices via unit lower triangular matrices (Part I)
(University of Guilan, 20240301)This paper uses unit lower triangular matrices to solve the nonnegative inverse eigenvalue problem for various sets of real numbers. This problem has remained unsolved for many years for $n \geq 5.$ The inverse of the ...

A fifthorder symmetrical weighted hybrid ENOflux limiter scheme for traffic flow model on networks
(University of Guilan, 20240301)In this research work, a fifthorder weighted essentially nonoscillatory (WENO) scheme is created for traffic flow problems on networks. Street systems can be numerically demonstrated as a graph, whose edges are a limited ...

An improved extended block Arnoldi method for solving lowrank Lyapunov equation
(University of Guilan, 20240301)We are interested in the numerical solution of the continuoustime Lyapunov equation. Generally, classical Krylov subspace methods for solving matrix equations use the PetrovGalerkin condition to obtain projected equations ...

A new numerical method for discretization of the nonlinear KleinGordon model arising in light waves
(University of Guilan, 20240301)Due to the importance of the generalized nonlinear KleinGordon equation (NLKGE) in describing the behavior of light waves and nonlinear optical materials, including phenomena such as optical switching by manipulating the ...

Analysis of a coupled pair of CahnHilliard equations with nondegenerate mobility
(University of Guilan, 20240301)A mathematical analysis is performed for a system consisting of two coupled CahnHilliard equations. These equations incorporate a diffusional mobility that depends on concentration. This modeling approach is often used ...

A fitted mesh method for a class of twoparameter nonlinear singular perturbation problems
(University of Guilan, 20240301)A class of twoparameter singularly perturbed nonlinear second order ordinary differential equations is considered in this article. A fitted mesh method which is a combination of finite difference scheme and a Shishkin ...

Finding a timedependent reaction coefficient of a nonlinear heat source in an inverse heat conduction problem
(University of Guilan, 20240301)In this article, we propose an approximate technique for reconstructing a timedependent reaction coefficient together with the surface heat flux histories and temperature distribution in a nonlinear inverse heat conduction ...

Convergence analysis of compact finite difference method for the solution of antiperiodic boundary value problems
(University of Guilan, 20240301)The main objective of this paper is to introduce the fourth and sixthorder compact finite difference methods for solving antiperiodic boundary value problems. Compact finite difference formulas can approximate the ...

A comparative study of singular spectrum analysis, neural network, ARIMA and exponential smoothing for monthly rainfall forecasting
(University of Guilan, 20231201)This paper investigates the accuracy of several forecasting methods for monthly rainfall forecasting. First, we study the feasibility of using the Singular Spectrum Analysis (SSA) to perform rainfall forecasts. When the ...

A novel implementation of fixedpoint theorems for highorder Hadamard fractional differential equations with multipoint integral boundary conditions
(University of Guilan, 20231201)This research inscription gets to grips with a novel type of boundary value problem of nonlinear differential equations encapsuling a fractional derivative known as the Hadamard fractional operator. Our results rely on the ...

A second order numerical method for twoparameter singularly perturbed timedelay parabolic problems
(University of Guilan, 20231201)In this article, a time delay parabolic convectionreactiondiffusion singularly perturbed problem with two small parameters is considered. We investigate the layer behavior of the solution for both smooth and nonsmooth ...

Estimate of the fractional advectiondiffusion equation with a timefractional term based on the shifted Legendre polynomials
(University of Guilan, 20231201)In this paper, we present a wellorganized strategy to estimate the fractional advectiondiffusion equations, which is an important class of equations that arises in many application fields. Thus, Lagrange square interpolation ...

A coveringbased algorithm for resolution of linear programming problems with maxproduct bipolar fuzzy relation equation constraints
(University of Guilan, 20231201)The linear programming problem provided to bipolar fuzzy relation equation constraints is considered in this paper. The structure of bipolar fuzzy relation equation system is studied with the maxproduct composition. Two ...

A robust optimization approach for multiobjective linear programming under uncertainty
(University of Guilan, 20231201)This paper proposes a new robust optimization approach for solving multiobjective linear programming problems under uncertainty. The uncertainty is assumed to be in the objective function coefficients and the constraint ...

A new public key cryptography using $M_{q}$ matrix
(University of Guilan, 20231201)We consider a new class of square Fibonacci $(q+1)\times(q+1)$matrices in public key cryptography. This extends previous cryptography using generalized Fibonacci matrices. For a given integer $q$, a $(q+1)\times(q+1)$ ...

Designing and evaluating an optimal budget plan for parallel network systems through DEA methodology
(University of Guilan, 20231201)For an optimal system design (OSD), data envelopment analysis (DEA) treats companies as black boxes disregarding their internal processes. Considering the effect of these processes into account companies can upgrade their ...